# In the Gibbs energy equation is "s" the symbol for entropy?

Jul 19, 2016

No.

$s$ is not the symbol for entropy. Sometimes, $s$ is used for specific heat capacity in $\text{J/g"cdot"K}$:

$q = m s \Delta T$

where:

• $q$ is heat flow in $\text{J}$. In is positive, and out is negative.
• $m$ is mass in $\text{g}$.
• $\Delta T$ is change in temperature in $\text{K}$ or $\text{^@ "C}$.

Entropy, however, is featured as $\underline{\underline{S}}$:

$\setminus m a t h b f \left(\Delta G = \Delta H - T \Delta S\right)$

where:

• $\Delta G$ is the Gibbs' Free Energy in $\text{kJ/mol}$.
• $\Delta H$ is the enthalpy in $\text{kJ/mol}$.
• $T$ is the temperature in $\text{K}$.
• $\Delta S$ is the entropy in $\text{J/K"cdot"mol}$.

The capitalization matters.